Picked up an Excalibur Vortex on a trade...used bow and I'm not sure where to start as far as my set-up (string silencers?? limb silencers??) and scope (vari-zone with the x-bow version of BDC). I noticed that my scope cross-hairs aren't level with my limbs...so I assume I need to start from scratch with my scope...should I just go to my local big box store and have the guy there help get me started? I don't know where there is a good shop around me (think mom and pop shop) that deals in x-bows and I'm the first in my circle of buddies to have one.